/*
   FreeRTOS.org V5.3.1 - Copyright (C) 2003-2009 Richard Barry.

   This file is part of the FreeRTOS.org distribution.

   FreeRTOS.org is free software; you can redistribute it and/or modify it
   under the terms of the GNU General Public License (version 2) as published
   by the Free Software Foundation and modified by the FreeRTOS exception.
   **NOTE** The exception to the GPL is included to allow you to distribute a
   combined work that includes FreeRTOS.org without being obliged to provide
   the source code for any proprietary components.  Alternative commercial
   license and support terms are also available upon request.  See the
   licensing section of http://www.FreeRTOS.org for full details.

   FreeRTOS.org is distributed in the hope that it will be useful,   but WITHOUT
   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
   more details.

   You should have received a copy of the GNU General Public License along
   with FreeRTOS.org; if not, write to the Free Software Foundation, Inc., 59
   Temple Place, Suite 330, Boston, MA  02111-1307  USA.


   ***************************************************************************
   *                                                                         *
   * Get the FreeRTOS eBook!  See http://www.FreeRTOS.org/Documentation      *
   *                                                                         *
   * This is a concise, step by step, 'hands on' guide that describes both   *
   * general multitasking concepts and FreeRTOS specifics. It presents and   *
   * explains numerous examples that are written using the FreeRTOS API.     *
   * Full source code for all the examples is provided in an accompanying    *
   * .zip file.                                                              *
   *                                                                         *
   ***************************************************************************

   1 tab == 4 spaces!

   Please ensure to read the configuration and relevant port sections of the
   online documentation.

   http://www.FreeRTOS.org - Documentation, latest information, license and
   contact details.

   http://www.SafeRTOS.com - A version that is certified for use in safety
   critical systems.

   http://www.OpenRTOS.com - Commercial support, development, porting,
   licensing and training services.
*/

#ifndef PORTMACRO_H
#define PORTMACRO_H

/*-----------------------------------------------------------
 * Port specific definitions.
 *
 * The settings in this file configure FreeRTOS correctly for the
 * given hardware and compiler.
 *
 * These settings should not be altered.
 *-----------------------------------------------------------
 */

/* Type definitions. */
#define portCHAR                       char
#define portFLOAT                     float
#define portDOUBLE                   double
#define portLONG                       long
#define portSHORT                       int
#define portSTACK_TYPE   unsigned portSHORT

#define portBASE_TYPE   portSHORT

#if( configUSE_16_BIT_TICKS == 1 )
   typedef unsigned portSHORT portTickType;
   #define portMAX_DELAY ( portTickType ) 0xffff
#else
   typedef unsigned portLONG portTickType;
   #define portMAX_DELAY ( portTickType ) 0xffffffff
#endif

/*-----------------------------------------------------------*/

typedef char tString;

/*-----------------------------------------------------------*/
 
/* Critical section control macros. */
#define portNO_CRITICAL_SECTION_NESTING      ( ( unsigned portSHORT ) 0 )

#define portENTER_CRITICAL()                                                  \
{                                                                             \
   extern volatile unsigned portSHORT usCriticalNesting;                      \
   __disable_interrupt();                                                     \
   __no_operation();                                                          \
                                                                              \
   /* Now interrupts are disabled usCriticalNesting can be accessed      */   \
   /* directly.  Increment ulCriticalNesting to keep a count of how many */   \
   /* times portENTER_CRITICAL() has been called.                        */   \
   usCriticalNesting++;                                                       \
}
   
#define portEXIT_CRITICAL()                                                   \
{                                                                             \
   extern volatile unsigned portSHORT usCriticalNesting;                      \
                                                                              \
   if( usCriticalNesting > portNO_CRITICAL_SECTION_NESTING )                  \
   {                                                                          \
      /* Decrement the nesting count as we are leaving a critical section. */ \
      usCriticalNesting--;                                                    \
      /* If the nesting level has reached zero then interrupts should be */   \
      /* re-enabled. */                                                       \
      if( usCriticalNesting == portNO_CRITICAL_SECTION_NESTING )              \
      {                                                                       \
        __enable_interrupt();                                                 \
      }                                                                       \
   }                                                                          \
}
   
   
/*-----------------------------------------------------------*/

/* Task utilities. */

/*
 * Manual context switch called by portYIELD or taskYIELD.
 */
extern void vPortYield( void );

#define portYIELD() vPortYield();

/*-----------------------------------------------------------*/

/* Hardware specifics. */
#define portBYTE_ALIGNMENT       2
#define portSTACK_GROWTH         (-1)
#define portTICK_RATE_MS         ((portTickType) 1000 / configTICK_RATE_HZ)
#define portNOP()                __no_operation()
/*-----------------------------------------------------------*/

#endif /* PORTMACRO_H */

